Dust-guard for axle-boxes.



PATENT-ED JUNE 4, 1907.

R. PURDIB. DUST GUARD FOR AXLE BOXES.

APPLICATION FILED FEB. 4, 1907.

* 1w: NDRR|S PETERS co, "Msnmoyon, n. c.

ROBERT PURDIE, OF CHICAGO, ILLINOIS. I

DUST-GUARD FOR AXLE-BOXES.

Specification of Letters Patent.

Patented June 4, 1907.

Application filed February 4, 1907. Serial No. 355,755.

To mZZ whom, it may concern:

Be it known that I, ROBERT PURDIE, a citizen of the United States, residing at Chicage, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Dust-Guards for Axle- Boxes; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to an improved dust guard for car axles and other journal boxes.

The object of the invention is to provide a simple and eflicient guard which will fit snugly around the axle when applied and will be automatically adjustable to compensate for wear.

Another object of the invention is to provide a dust guard with means for holding the parts in open position until fitted on the axle to which it is to be applied.

In the accompanying drawings, Figure 1 represents a perspective view of this improved dust guard; Fig. 2 represents a vertical section thereof; and Fig. 3 represents a transverse section taken on the line 3-3 of Fig. 2.

In the embodiment herein illustrated are two approximately L-shaped members 1 and 20, the inner faces of which are curved to form when these members are assembled a complete circular opening adapted to fit the axle to which it is to be applied. These members 1 and 20 are exactly alike except that the long arm of the member 20 is about an inch longer than the long arm 2 of the member 1 to provide for the separation of the parts a sufficient distance to permit the guard to be slipped over the axle and adjusted in position without bending and hence the member 1 only will be described in detail. The long arm 2 of this member 1 is provided in its outer edge, preferably in the middle thereof, with a groove or recess 4 and the free end of this arm is bifurcated for a purpose hereinafter described. Projecting laterally from the edge of the short arm 3 near its lower end is a tongue 5 on which the bifurcated free end of the long arm of the member 20 fits and slides when the parts are assembled. Extending around this tongue 5 and spaced therefrom at its end is a yoke or guard 6, the ends 7 and 8 of which are secured to the opposite sides of the member 1.

This yoke 6 serves as a guide for the bifurcated long arm of the member 20 and to hold it against lateral displacement.

Projecting from the lower edge of the short arm 3 are spaced headed studs as 9'on which a locking bar 10 is mounted to slide longitudinally. This bar 10 is made of a length to correspond with the width of the member 1 and is provided at its opposite ends with slots 11 and 12 to receive the studs as 9 and the inner end walls of which engage these studs and limit the movement of the bar in opposite directions. These slots 11 and 12 are made of a predetermined length to permit the bar 10 to move in one direction until the end thereof extends flush with the side edge of the member 1 and in the other direction until it extends over the end of the long arm of the member 20 when the mem bers are extended against the tension of the springs now to be described.

When the parts are assembled, the bifurcated end of the long arm of one member is slid endwise through the yoke over the tongue of the short arm of the other member and a screw as 15 is then passed between the ends of the long arm as 5 and the crotch of the forked end and is screwed into the edge of the short arm of the other member. A spiral spring as 16 is disposed in the groove as 4 of the long arm of each member and is secured at one end to the screw as 15 and at its other end to a headed stud as 17 at the opposite end of the groove 4. A metal strap as 18 is secured to the edge of each long leg or arm of the members 1 and 20 by means of the screws as 15 extending through an aperture in one end thereof and by screws as 19 extending through slots as 18 in its other end These straps as 18 serve to protect the springs and to keep out the dust, the slots as 18 limit the outward movment of the members 1 and 2-0 and prevent the springs from being stretched too far and destroying their operativeness.

I claim as my invention,

1. A dust guard for journal boxes comprising two members slidable relatively to each other, retracting springs for drawing them together, and means for locking said members in extended position.

2. A dust guard for journal boxes comprising two L-shaped members slidable relatively to each other with the long arm of one member engaging the short arm of the other member, retracting springs for drawing them ITO together, and meansfor locking said members in extended position.

3. A dust guard for journal boxes comprising two members slidable relatively to each other, retracting springs for drawing them together and a slide mounted on one of said members in position to engage the other member and hold them in extended position.

4. A dust guard for journal boxes comprising two L-shaped members slidable relatively to each other with the inner face of the long arm of one member engaging the outer face of the short arm of the other member, there being a tongue projecting laterally from each of said short arms, and the free ends of the long arms of said members being bifurcated to straddle and slide on said tongues, guards mounted on said members for holding said long arms in sliding engagement with said tongues, and springs for retracting said members.

5. A dust guard for journal boxes comprising two L-shaped members slidable relatively to each other with the inner face of the long arm of one member engaging the outer face of the short arm of the other member, there being a tongue projecting laterally from each of said short arms, and the free ends of the long arms ofsaid members being bifurcated to straddle and slide on said tongues, guards mounted on said members for holding said long arms in sliding engagement with said tongues, a screw projecting from the ends of each of said arms, spiral springs secured at one end to said screws and at their other end to the long arm of the other members, and means for limiting the outward movement of said members against the tension of the springs.

In testimony whereot I have hereunto set my hand in presence of two subscribing Wit- IIGSSGS.

ROBERT PUB-DIE. Witnesses:

WILLIAM TURK, CHARLES D. RoUNDs. 

